Mathematical aid



FIG. 1 is an isometric view of the mathematical aid showing my newdesign;

FIG. 2 is an enlarged front elevational view thereof;

FIG. 3 is an enlarged side elevational view thereof;

FIG. 4 is an enlarged top plan view thereof;

FIG. 5 is an enlarged bottom plan view thereof.

The ornamental design for an educational aid called mathematical aid, asshown.